55 East 21 ST StreetCo
Multifamily Housing in New York City, NY · 55 East 21 ST · 11226
At a glance
55 East 21 ST StreetCo is a 67,564-square-foot multifamily housing building in New York City, New York, built in 1935. In its 2023 New York City benchmarking disclosure it reported an ENERGY STAR score of 42 out of 100 (grade D), a site energy-use intensity of 100.6 kBtu/ft² and 399 tCO₂e of greenhouse-gas emissions. That score is higher than 25% of the 22,829 scored multifamily housing buildings in New York City.
Local Law 84 (LL84) · reporting year 2023
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 42 (band D) |
| Site EUI | 100.6 kBtu/ft² |
| Source EUI | 123.4 kBtu/ft² |
| GHG emissions | 399 tCO₂e |
| GHG intensity | 5.9 kgCO₂e/ft² |
| Electricity | 201,641 kWh |
| Natural gas | 61,059 therms |
| Water use | 6,775 kgal |
| Gross floor area | 67,564 sq ft |
| Source record | nyc:26649199:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 42 | +13 | 100.6 kBtu/ft² | 399 tCO₂e |
| 2022 | 29 | 120.0 kBtu/ft² | 452 tCO₂e |
Compliance context
Local Law 84 (LL84)
Under Local Law 97, buildings over 25,000 sq ft face carbon caps with fines of $268 per metric ton of CO₂e over the limit, phasing in from 2024.
Ownership
No owning organisation shown. Names of private individuals in the disclosure are not published here.
Own or manage this building? Claim it to correct the record and get compliance alerts.
Location
- Address
- 55 East 21 ST
- City
- New York City
- State
- New York
- ZIP
- 11226
- Coordinates
- 40.65320, -73.96053
Within ~1 km
Nearby benchmarked buildings
Multifamily Housing · 3,117,085 sq ft
K-12 School · 460,800 sq ft
- TMG - 123 Linden - PLGscore 34
Multifamily Housing · 403,116 sq ft
- Benjamin Baum: 590 Flatbush Avescore 67
Multifamily Housing · 346,072 sq ft
- 800 Flatbush Avenuescore 85
Multifamily Housing · 281,008 sq ft
- Benjamin Baum: 580 Flatbush Avescore 61
Multifamily Housing · 257,076 sq ft
See also: most efficient in New York City · biggest emitters
How does 55 East 21 ST StreetCo compare with other multifamily housing buildings in New York City?
The latest disclosures cover 33,022 multifamily housing buildings in New York City, out of 48,310 buildings citywide. 55 East 21 ST StreetCo's ENERGY STAR score of 42 compares with an average of 63 across the 22,829 that report a score; it scores higher than 25% of them and lower than 74%. Its site EUI of 100.6 kBtu/ft² is about 34% above the average of 74.9 kBtu/ft² — it uses more energy per square foot than the typical building in that group. Its emissions intensity of 5.9 kgCO₂e/ft² is about 13% above the group average of 5.2 kgCO₂e/ft².
At 67,564 sq ft, it is about 33% below the average floor area of 100,951 sq ft for those buildings. It was built in 1935, 17 years earlier than the group's average year built (1952). Across all 24 jurisdictions BuildingCensus covers, the 59,945 multifamily housing buildings average an ENERGY STAR score of 70 and a site EUI of 59.0 kBtu/ft².
How has 55 East 21 ST StreetCo's energy performance changed over time?
BuildingCensus holds 2 New York City disclosures for 55 East 21 ST StreetCo, covering report years 2022–2023. Its ENERGY STAR score went from 29 in 2022 to 42 in 2023 (+13 points). Site EUI moved from 120.0 kBtu/ft² (2022) to 100.6 kBtu/ft² (2023), a 16% decrease. Reported emissions went from 452 tCO₂e to 399 tCO₂e over the same span (down 12%).
What does an ENERGY STAR score of 42 mean?
ENERGY STAR scores run from 1 to 100 and are computed by the EPA's Portfolio Manager as a percentile against similar buildings nationwide, adjusted for climate, size and use: a score of 42 means the building performs better than about 42% of its national peers. BuildingCensus bands the score into report-card grades; 42 falls in band D — lowest band (1–54). It sits 33 points below 75, the threshold for ENERGY STAR certification. In New York City, 43% of scored buildings are at 75 or above.
Site energy-use intensity (EUI) is the energy a building uses on site in a year divided by its floor area, in thousand Btu per square foot — lower is more efficient. 55 East 21 ST StreetCo's 100.6 kBtu/ft² across 67,564 sq ft works out to about 6.8 billion Btu (1,992 MWh-equivalent) in 2023. Its source EUI of 123.4 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 201,641 kWh of electricity, 61,059 therms of natural gas and 6,775 thousand gallons of water for the year.
Which law requires 55 East 21 ST StreetCo to report its energy use?
55 East 21 ST StreetCo reports under Local Law 84 (LL84), the legal basis of New York City's Energy and Water Data Disclosure program, which publishes each covered building's annual benchmarking results. The record shown here is the report-year 2023 disclosure (source record nyc:26649199:2023). Under Local Law 97, buildings over 25,000 sq ft face carbon caps with fines of $268 per metric ton of CO₂e over the limit, phasing in from 2024.
More multifamily housing buildings in New York City
- ECHO Apartments· 67,536 sq ft · score 53 (D)
- Sojourner Truth Houses· 67,535 sq ft · score 2 (D)
- 980-994 Columbus Avenue (Parent Property)· 67,535 sq ft · score 82 (B)
- Metropolitan Realty : 980-994 Columbus· 67,535 sq ft · score 44 (D)
- Evergreen Hills II· 67,528 sq ft · EUI 4.2 kBtu/ft²
- Evergreen Hills III· 67,528 sq ft · EUI 46.6 kBtu/ft²
- Multifamily Housing buildings in New York City· 33,022 benchmarked
- All New York City benchmarked buildings· Local Law 84 (LL84)
- Most efficient large buildings in New York City
- Least efficient large buildings in New York City
- Biggest emitters in New York City
Frequently asked questions
What is 55 East 21 ST StreetCo's energy grade?
55 East 21 ST StreetCo scores 42 out of 100 on ENERGY STAR — band D, lowest band (1–54) — in its 2023 New York City disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 55 East 21 ST StreetCo use?
Its 2023 site energy-use intensity was 100.6 kBtu/ft² (123.4 kBtu/ft² source) across 67,564 sq ft, including 201,641 kWh of electricity and 61,059 therms of natural gas.
What are 55 East 21 ST StreetCo's carbon emissions?
55 East 21 ST StreetCo reported 399 tCO₂e of greenhouse-gas emissions (5.9 kgCO₂e/ft²) for 2023.
Where is 55 East 21 ST StreetCo?
55 East 21 ST StreetCo is in New York City, New York 11226. Its coordinates are 40.65320, -73.96053 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 55 East 21 ST StreetCo and when was it built?
55 East 21 ST StreetCo has 67,564 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1935 as its year built. It is classed as multifamily housing.
Is 55 East 21 ST StreetCo covered by Local Law 84 (LL84)?
Yes — it appears in the 2023 Energy and Water Data Disclosure disclosure, which lists the buildings reporting under Local Law 84 (LL84).
Working with New York City building benchmarking records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
About this data
Source: Energy and Water Data Disclosure (Local Law 84 (LL84)), as published October 2, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: BuildingCensus, “55 East 21 ST StreetCo, New York City, New York — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/55-east-21-st-streetco-6408be3d (data as of October 2, 2026).